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April 17, 1909, Vol LII, No. 16 >
ARTICLE | April 17, 1909

COMPLEMENTAL OPPOSITION

C. F. HOOVER, M.D.
JAMA. 1909;LII(16):1234-1235. doi:10.1001/jama.1909.25420420014002d.
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I published some time ago a brief article1 in which was described the method of employing a coordinated contralateral spinal reflex for differentiating between functional and genuine pareses of the lower extremities. This reflex was termed complemental opposition. Dr. Zenner, of Cincinnati, published later an account2 of some clinical observations on genuine and functional pareses which confirmed my own observations. Dr. Zenner, however, said that he could not confirm my observations on normal subjects in detecting the contralateral opposition when the initial movement involved activation of the extensor iliofemoral muscles of one side; that is, if a patient lying on a couch is instructed to oppose one leg against the surface of the couch, thus activating the extensor iliofemoral muscles of that side, Dr. Zenner does not find complemental opposition manifested in the other thigh and leg.

It is true that the complemental opposition in response to an

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